Whatnot is things that are collected but not necessarily useful or important, like decorations or knick-knacks.
You might use whatnot to describe your grandma's old vases on the shelf, but it also applies to things you find at thrift stores or garage sales. When people say they're looking for a new place for their whatnot, they mean they want to display these random objects in a way that looks nice. Some people even call this "stuff" or "tchotchkes," but whatnot is more casual and friendly-sounding.
A small unspecified object; bric-a-brac (in plural)
